Synthesis of sterically hindered N -benzyladamantyl substituted benzimidazol-2-ylidene palladium complexes and investigation of their catalytic activity in aqueous medium

Tetrahedron ◽  
2017 ◽  
Vol 73 (40) ◽  
pp. 5940-5945 ◽  
Author(s):  
Zineb Imene Dehimat ◽  
Aziz Paşahan ◽  
Dahmane Tebbani ◽  
Sedat Yaşar ◽  
İsmail Özdemir
Keyword(s):  
Catalytic Activity ◽  
Aqueous Medium ◽  
Palladium Complexes ◽  
Sterically Hindered

Zwitterionic Palladium Complexes: Room-Temperature Suzuki–Miyaura Cross-Coupling of Sterically Hindered Substrates in an Aqueous Medium

2014 ◽  
Vol 33 (22) ◽  
pp. 6481-6492 ◽  
Author(s):  
Jhen-Yi Lee ◽  
Dabalina Ghosh ◽  
Jing-Yi Lee ◽  
Shih-Sheng Wu ◽  
Ching-Han Hu ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Room Temperature ◽  
Cross Coupling ◽  
Palladium Complexes ◽  
Sterically Hindered

Catalytic activity of chelating N-heterocyclic carbene palladium complexes towards selective phosphorylation of coumarins

2016 ◽  
Vol 818 ◽  
pp. 179-184 ◽  
Author(s):  
Liangru Yang ◽  
Xinchi Zhang ◽  
Jinwei Yuan ◽  
Yongmei Xiao ◽  
Pu Mao
Keyword(s):  
Catalytic Activity ◽  
Palladium Complexes

Homogeneous versus Supported ONN Pincer-Type Gold and Palladium Complexes: Catalytic Activity

ChemSusChem ◽  
2009 ◽  
Vol 2 (7) ◽  
pp. 650-657 ◽  
Author(s):  
Carolina del Pozo ◽  
Nathalie Debono ◽  
Avelino Corma ◽  
Marta Iglesias ◽  
Félix Sánchez
Keyword(s):  
Catalytic Activity ◽  
Palladium Complexes

scholarly journals Amine-Catalysed Suzuki–Miyaura-Type Coupling? the Identification and Isolation of the Palladium Culprits.

2021 ◽  
Author(s):  
Mickaël Avanthay ◽  
Robin Bedford ◽  
Callum Begg ◽  
Dietrich Böse ◽  
Jonathan Clayden ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Cross Coupling ◽  
Boronic Acids ◽  
Palladium Complexes ◽  
Aryl Halides ◽  
Type Coupling ◽  
Paradigm Shifting

A recent report in Nature Catalysis detailed the potentially paradigm-shifting organocatalysis of Suzuki cross-coupling of aryl halides with aryl boronic acids, catalysed by simple amine species. We have conducted a reinvestigation of key claims in this paper across multiple academic and industrial laboratories that shows that the observed catalytic activity cannot be due to the amine, but rather is due to tricyclohexylphosphine palladium complexes that are readily entrained during the purification of the amine<b>.</b>

A structure/catalytic activity study of gold(i)–NHC complexes, as well as their recyclability and reusability, in the hydration of alkynes in aqueous medium

2016 ◽  
Vol 6 (6) ◽  
pp. 1921-1929 ◽  
Author(s):  
Gabriela A. Fernández ◽  
Alicia B. Chopa ◽  
Gustavo F. Silbestri
Keyword(s):  
Catalytic Activity ◽  
Aqueous Medium ◽  
Comparative Studies ◽  
Reaction Times ◽  
Silver Salts

Comparative studies were carried out with the addition of different silver salts. Our results indicate that the bulkier complex is the most effective and that the addition of methanol as co-solvent not only shortens reaction times but also stabilizes the less bulky complexes.

scholarly journals Polystyrene-Supported Acyclic Diaminocarbene Palladium Complexes in Sonogashira Cross-Coupling: Stability vs. Catalytic Activity

Catalysts ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 141 ◽  
Author(s):  
Vladimir Mikhaylov ◽  
Viktor Sorokoumov ◽  
Denis Liakhov ◽  
Alexander Tskhovrebov ◽  
Irina Balova
Keyword(s):  
Catalytic Activity ◽  
High Activity ◽  
Cross Coupling ◽  
Palladium Complexes ◽  
Lower Activity ◽  
Coupling Conditions ◽  
Acyclic Diaminocarbene ◽  
Supported Palladium ◽  
Polymer Supported

Two types of immobilized on the amino-functionalized polystyrene-supported acyclic diaminocarbene palladium complexes (ADC-PdII) are investigated under Sonogashira cross-coupling conditions. Depending on substituents in the diaminocarbene fragment immobilized ADC-PdII, systems are found to have different catalytic activity and stability regarding Pd-leaching. PdII-diaminocarbenes possessing protons at both nitrogen atoms smoothly decompose into Pd0-containing species providing a catalytic “cocktail system” with high activity and ability to reuse within nine runs. Polymer-supported palladium (II) complex bearing NBn–Ccarbene–NH-moiety exhibits greater stability while noticeably lower activity under Sonogashira cross-coupling. Four molecular ADC-PdII complexes are also synthesized and investigated with the aim of confirming proposed base-promoted pathway of ADC-PdII conversion through carbodiimide into an active Pd0 forms.

NNN-type iron(II) complexes consisting sterically hindered dibenzocycloheptyl group: Synthesis and catalytic activity towards ethylene polymerization

2020 ◽  
Vol 492 ◽  
pp. 110981 ◽  
Author(s):  
Muhammad Zada ◽  
Arumugam Vignesh ◽  
Hongyi Suo ◽  
Yanping Ma ◽  
Hua Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ethylene Polymerization ◽  
Sterically Hindered
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